My favourite method for reducing sugar consumption was in reducing sugar purchases. When I first started, it was a bet with my mother, and we both only got to buy anything with sugar in it in response to a holiday (with a list of exception items that we couldn’t replace, for weird dietary reasons that are particular to us). The only thing that we couldn’t buy was an actual bag of sugar. We could still have sugary treats others bought for us or available at an event, or whatever (but not buy dessert at restaurants or put sugar in our Starbucks).
I liked that so much that when our bet was over, I turned it into a Beeminder graph. I changed the “can’t buy a bag of sugar” rule to it costing 5 units in my graph (since I would want to have it around for baking or making egg nog, and I lean away from using it anyway, so that was okay for me). Everything else was just +1 unit, whether it was a single-serving candy or a bottle of maple syrup. That made it crazy easy to track, and it didn’t really feel as restrictive as all that. It did enough to cause me to reduce my sugar consumption, but there was a lot of flexibility and leniency to it. If you’re trying to quit outright, it might not be particularly helpful, but if you’re trying to reduce consumption, I highly recommend trying it to see if it’s as handy for you as it was for me!